In recent years, the emergence of the cloud computing has increased the need of resources to support cloud-based services. Therefore, the role of the data centers has become essential. Following the growing of services, the power consumption has increased dramatically, while the need for energy savings and CO2 reduction has become a requirement for a sustainable world.
The All4Green project fosters collaboration between energy providers (EP), data centers (DC) and customers/end users (EU) in order to provide energy sav-ings and CO2 emissions reduction. In this architecture, the contract binding EPs and DCs includes flexibility terms in order to allow the collaboration in the form of discounts that can be transferred also to DC customers, if they are willing to collaborate.

In this paper we propose a simple QoS-based dynamic pricing approach for services provisioning in a heterogeneous wireless access network environment which attempts to increase user’s satisfaction level by firstly, maximizing the provided QoS level, and secondly, by applying dynamic pricing strategies according to the QoS. These strategies will allow service providers to maximize their profits. Simulation results demonstrate that the proposed dynamic pricing approach benefits both users and wireless service providers (WSPs). Results also suggest that users have better overall satisfaction due to a better QoS level and fairer prices. The analysis shows that our proposed pricing approach contributes to an increase in WSPs profits compared to the application of the flat-rate pricing model in a competitive market-model.

Vehicular Ad-hoc Networks (VANETs) are currently in everyone's mouth when talking about future technologies that will be implemented in the automotive industry. In the last years the IEEE group has been working in the development of a standard for vehicular communications, this standard is the 802.11p. Most research work in this area has focused on vehicle-to-vehicle communication architecture, thus, more research is still necessary on the vehicle-to-infrastructure communication architecture. In this paper we present a performance study of the 802.11p technology for the development of applications in VANETs. This work simulates the IEEE 802.11p technology in a vehicular scenario. Results show that the IEEE 802.11p is an adequate technology for the development of several vehicular applications in terms of rate of packet loss, average end-to-end delay, and throughput.

Heterogeneous wireless access networks (HWAN) will
create a market for the delivery of an extensive collection of novel
and attractive services and contents. Accounting and pricing the
ubiquitous services will play a key role from both service
providers and users point of view. By one hand, wireless service
providers (WSP) look for the maximum revenue and utilization
rate and by other hand users will select service providers
depending on the offered price and the Quality of Service (QoS)
assurance. In such a market-based scenario, accounting will
become an effective tool that satisfies the users’ service demands
and maximizes the revenue of the providers.

In this paper we propose the application of
intelligent agents in traffic-lights, for the road control of urban transit in the city of Colima, México; using a multi-agent approach for dynamic urban traffic-lights
system coordination that relies on locally available traffic data and the traffic condition of the neighboring intersections. According to this approach, our system
consists of agents distributed into a hierarchical architecture. Each agent is responsible for one activity, for example, traffic data collection, preprocessing of
these data and decision making of econfiguration of the traffic-lights controllers. An intelligent algorithm based on the policy management model is defined and used as an auxiliary element for the coordination mechanism in order to form an adaptive control system with learning
capabilities that allows a more fluid traffic and reduce some of the problems that the society face such as the average wait time and trip travel time and the average size queue per intersection. We define a model based on configuration profiles that are used as initial configurations and new configuration profiles are created as the traffic conditions change. Our approach is experimented with traffic control of a few connected junctions and the result obtained is promising; it can reduce the average delayed time of each car at each traffic-light near an intersection rather substantially when compared with the current traffic-lights control approach.

This document defines a number of changes and extensions to the
Policy Core Lightweight Directory Access Protocol (LDAP) Schema (RFC
3703) based on the model extensions defined by the Policy Core
Information Model (PCIM) Extensions (RFC 3460). These changes and
extensions consist of new LDAP object classes and attribute types.
Some of the schema items defined in this document re-implement
existing concepts in accordance with their new semantics introduced
by RFC 3460. The other schema items implement new concepts, not
covered by RFC 3703. This document updates RFC 3703.

In today's telecommunications world the networks offer several new services involving higher and higher requirements, it means an increment of management complexity that cannot be adequately solved with the management platforms of previous years. This thesis is a contribution to new management schemes for big-scale networks; especially it is a set of contributions to the Policy-Based Management Systems (PBMS) without loosing compatibility with the current management systems such as SNMP, agent-based management, etc.Current research mainly proposes the use of policies to configure network local devices and admission control. This thesis works on a wide perspective about the use of policies. An efficiently architecture for network management on the basis of directories and policy roles is proposed, also there is a full analysis of policies from its design to its implementation in the network elements. The creation of policies can be carried out by different entities, for example network administrators, users (personalized policies) and when the network itself creates own policies based on a previous set of policies (metapolicies). In this thesis the representation of high-level policies is based on the Policy Core Information Model (PCIM) and their extensions (PCIMe) from the DMTF and the IETF. Policies are stored in a directory using the Lightweight Directory Access Protocol (LDAP) via an object oriented classes model designed in this thesis. These results led to an Internet draft for the policy-working group of the IETF.Because of direct implementation of high-level policies in the network elements it is not possible, it is necessary to establish a set of configuration parameters that define the policy that has to be enforced in the network. The methodology to map high-level policies to low-level policies is detailed in this thesis. Mapping processes involve the use of policy roles and profiles that come from Service Level Specifications (SLS) that users agree with the network. The implementation of the management system uses four SLS profiles but it is scalable to allow increasing profiles according to different aspects such as new services offered by the network, topology of the network, business goals, etc.The policy architecture manages heterogeneous interconnected networks, for this reason policy repositories have to be able of storing hundreds or thousands of policies in order to get the desired behavior in the entire network. Due to the fact that policy decision points have to choose adequate policies to apply in the network from a very big set of policies, the network performance could be affected. This thesis proposes an efficient selection and evaluation process on the basis of both, policy roles and the network status in a specific time.To solve possible conflicts that can occur between selected policies and avoid system inconsistencies, a set of models for the prevention and resolution of conflicts between policies is proposed. Prevention process has an algorithm to avoid syntactic conflicts and edition of new policies that produce potential conflicts with previous defined policies. Prevention process also considers congruency among policies, business goals and network topology.Conflict resolution process solves conflicts occurring during the performance of the system, this method is based on hyper geometrical spaces and policy roles to select the adequate policy, from the conflicting policies. These methods are presented in the Thesis with an application in a routing system with Quality of Service (QoS) restrictions into a network scenario based on Differentiated Services and the Multi Protocol Label Switching (MPLS).